Spurr G B, Reina J C
Department of Physiology, Medical College of Wisconsin, Milwaukee.
Med Sci Sports Exerc. 1990 Oct;22(5):643-52. doi: 10.1249/00005768-199010000-00016.
The pattern of usage of the VO2max, expressed as %VO2max during ordinary school days, with minute-by-minute heart rate recording, was studied in 106 boys and 83 girls, 6-16 yr of age divided into three age groups (6-8, 10-12, and 14-16 yr), living under economically deprived conditions in Colombia and classified as nutritionally normal or marginally malnourished. In a 12-h period, the 12 groups of children spent, on the average, 7-10 h at less than 30% VO2max, 1.5-4 h at 30-50% VO2max, and an accumulated time of 20-60 min above 50% VO2max. The latter occurred in short bursts rather than during sustained periods. There was a statistically significant but small decrease (approximately -3%) in the average 12 h %VO2max with age but no effects of sex or nutritional status. The overall average was about 25% VO2max in all groups. The data may suggest the existence of the regulation of physical activity to some level easily sustainable for long periods. Expressing the data as 30 min averages during 5 h of school and 5 h of free-time activity allows for the possibility of seeing group differences during shorter periods of time. This may prove useful in exercise training programs and studies of effort in the workplace.
在哥伦比亚经济贫困条件下生活的106名男孩和83名女孩（年龄6至16岁，分为三个年龄组：6至8岁、10至12岁和14至16岁）中，研究了最大摄氧量（VO2max）的使用模式，即普通上学日期间以VO2max百分比表示，并进行逐分钟心率记录，这些儿童被分类为营养正常或边缘性营养不良。在12小时的时间段内，12组儿童平均有7至10小时处于低于30%VO2max的水平，1.5至4小时处于30%至50%VO2max的水平，累积有20至60分钟处于高于50%VO2max的水平。后者以短时间爆发而非持续时间段的形式出现。平均12小时的VO2max百分比随年龄有统计学上显著但较小的下降（约-3%），但不受性别或营养状况的影响。所有组的总体平均值约为25%VO2max。这些数据可能表明存在将身体活动调节到某种易于长期维持的水平。将数据表示为在校5小时和课余活动5小时期间的30分钟平均值，使得有可能在较短时间段内观察到组间差异。这在运动训练计划和工作场所的努力研究中可能会证明是有用的。
